package goodweather.cjxy.edu;

import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import goodweather.cjxy.edu.db.City;
import goodweather.cjxy.edu.db.County;
import goodweather.cjxy.edu.db.Province;
import goodweather.cjxy.edu.goodweather.R;
import goodweather.cjxy.edu.util.HttpUtil;
import goodweather.cjxy.edu.util.Utility;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class ChooseAreaFragment extends Fragment {
    public static final int LEVEL_PROVINCE = 0;
    public static final int LEVEL_CITY = 1;
    public static final int LEVEL_COUNTY = 2;
    private ProgressDialog progressDialog;
    private TextView titleText;
    private Button backButton;
    private ListView listView;
    private ArrayAdapter<String> adapter;
    private List<String> dataList = new ArrayList<>();

    /**
     * 省列表
     */
    private List<Province> provinceList;

    /**
     * 市列表
     */
    private List<City> cityList;

    /**
     * 县列表
     */
    private List<County> countyList;

    /**
     * 选中的省份
     */
    private Province selectedProvince;

    /**
     * 选中的城市
     */
    private City selectedCity;

    /**
     * 当前选中的级别
     */
    private int currentLevel;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.choose_area, container, false);//加载碎片
        titleText = (TextView) view.findViewById(R.id.title_text);
        backButton = (Button) view.findViewById(R.id.back_button);
        listView = (ListView) view.findViewById(R.id.list_view);
        adapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, dataList);//创建适配器
        listView.setAdapter(adapter);
        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {// listview item 点击事件
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                if (currentLevel == LEVEL_PROVINCE) {//如果选中的是省
                    selectedProvince = provinceList.get(position);//获取点击的省份
                    queryCities();  //查询这个省的所有市
                } else if (currentLevel == LEVEL_CITY) {
                    selectedCity = cityList.get(position);//获取点击的市
                    queryCounties();
                }else if(currentLevel==LEVEL_COUNTY){//如果是选中的是县城
                    String weatherId= countyList.get(position).getWeatherId();//获取城市天气id
                    if(getActivity() instanceof  MainActivity){
                        Intent i=new Intent(getActivity(),WeatherActivity.class);
                        i.putExtra("weather_id",weatherId);
                        startActivity(i);
                        getActivity().finish();
                    }else if(getActivity() instanceof  WeatherActivity){
                        SharedPreferences.Editor editor=PreferenceManager.getDefaultSharedPreferences(getContext()).edit();
                        WeatherActivity activity= (WeatherActivity)getActivity();
                        activity.drawerLayout.closeDrawers();
                        activity.swipeRefresh.setRefreshing(true);
                        editor.putString("weather_id",weatherId);
                        editor.apply();
                        activity.requestWeather(weatherId);
                    }

                }
            }
        });

        backButton.setOnClickListener(new View.OnClickListener() {//点击返回按键
            @Override
            public void onClick(View v) {
                if (currentLevel == LEVEL_COUNTY) {//返回上一级数据
                    queryCities();
                } else if (currentLevel == LEVEL_CITY) {
                    queryProvinces();
                }
            }
        });

        queryProvinces();//默认选择省
    }

    /**
     * 查询全国所有的省,优先从数据库查询,如果没有再到服务器上去查询
     */
    private void queryProvinces() {
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        //查询数据库全部的省份
        provinceList = DataSupport.findAll(Province.class);//litepal 查询数据

        if (provinceList.size() > 0) {
            dataList.clear();
            for (Province province : provinceList) {
                dataList.add(province.getProvinceName());//装数据
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);//默认选中第一项
            currentLevel = LEVEL_PROVINCE;//设置默认选中级别
        } else {//数据库中没有数据
            String address = "http://guolin.tech/api/china";
            queryFromServer(address, "province");//去服务器查数据
        }
    }

    /**
     * 查询选中的省的所有市
     */
    private void queryCities() {
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);

        cityList = DataSupport.where("provinceid=?", String.valueOf(
                selectedProvince.getId()//选中省份的id
        )).find(City.class);//查询指定省的城市

        if (cityList.size() > 0) {
            dataList.clear();
            for (City city : cityList) {
                dataList.add(city.getCityName());//获取城市名字
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);//默认选中第一项
            currentLevel = LEVEL_CITY;//设置默认级别
        } else {
            int provinceCode = selectedProvince.getProvinceCode();//获取选中的省份
            String address = "http://guolin.tech/api/china/" + provinceCode;
            queryFromServer(address, "city");
        }
    }

    /**
     * 查询选中市的下面的县
     */
    private void queryCounties() {
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityid=?", String.valueOf(selectedCity.getId()))
                .find(County.class);//查询指定城市的所有县城

        if (countyList.size() > 0) {
            dataList.clear();
            for (County county : countyList) {
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        } else {
            int provinceCode = selectedProvince.getProvinceCode();//获取选中的省份
            int cityCode = selectedCity.getCityCode();//获取选中的市
            String address = "http://guolin.tech/api/china/" + provinceCode + "/" + cityCode;
            queryFromServer(address, "county");
        }

    }

    private void queryFromServer(String address, final String type) {
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responseText = response.body().string();//获取服务器响应的内容

                boolean result = false;
                if ("province".equals(type)) {
                    result = Utility.handleProvinceRespnse(responseText);//解析json 把数据存到数据库中
                } else if ("city".equals(type)) {
                    result = Utility.handleCityResponse(responseText, selectedProvince.getId());
                } else if ("county".equals(type)) {
                    result = Utility.handleCountyResponse(responseText, selectedCity.getId());
                }

                if (result) {
                    getActivity().runOnUiThread(new Runnable() {//回到ui线程
                        @Override
                        public void run() {
                            closeProgressDialog();//关闭对话框
                            if ("province".equals(type)) {
                                queryProvinces();
                            } else if ("city".equals(type)) {
                                queryCities();
                            } else if ("county".equals(type)) {
                                queryCounties();
                            }
                        }
                    });
                }
            }

            @Override
            public void onFailure(Call call, IOException e) {//访问异常
               getActivity().runOnUiThread(new Runnable() {
                   @Override
                   public void run() {
                       closeProgressDialog();
                       Toast.makeText(getContext(), "加载失败", Toast.LENGTH_SHORT).show();
                   }
               });
            }
        });
    }


    /**
     * 加载框
     */
    private void showProgressDialog() {
        if (progressDialog == null) {
            progressDialog = new ProgressDialog(getActivity());//再指定位置显示进度条对话框
            progressDialog.setMessage("正在加载...");
            progressDialog.setCanceledOnTouchOutside(false);//设置不可点击取消
        }
        progressDialog.show();
    }

    /**
     * 关闭加载框
     */
    private void closeProgressDialog() {
        if (progressDialog != null) {
            progressDialog.dismiss();//关闭对话框
        }
    }
}